This is a white wagtail of the subspecies ocularis, a regular winter visitor to Hong Kong.
Note the obvious black eye-stripe, pale grey back and mostly dark wing coverts.
The lugens subspecies (a rare winter visitor, although with several records recently) has a similar eye-stripe, but the back is black (or very dark grey) and the wing coverts are pure white. Author: james4j Time: 7/03/2008 13:53
Thanks very much, John.
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